1. Asatoor, A. M., Armstrong, M. D.: 3-methylhistidine, a component of actin. Biochem. biophys. Res. Commun.26, 168 (1967)
2. Bock, H. E., Gerok, W.: Die freien und gebundenen Aminosäuren im Serum bei Niereninsuffizienz. Dtsch. med. Wschr.86, 704 (1961)
3. Fürst, P., Allgen, L.-G., Bergström, J., Ekborg, S., Persson, B. A., Pyhage, R., Zimmermann, L.: New bioanalytical methods for the study of uremic toxcity. In: Uremia, ed. by Kluthe, R., Berlyne, G. and Burton, B. Stuttgart: Thieme 1973
4. Giordano, C., De Pascale, C., De Cristofaro, D., Capodicasa, G., Balestrieri, C., Baczyk, K.: Protein malnutrition in the treatment of chronic uremia. In: Nutrition in renal disease, ed. by Berlyne, G. M. Edinburgh- London: E. & S. Livingstone 1968
5. Gulyassy, P. F., Peters, H. J., Lin, S. C., Ryan, P. M.: Hemodialysis and plasma amino acid composition in chronic renal failure. Amer. J. clin. Nutr.21, 565 (1968)